GB/T 38509-2020 in English
VALIDCode for the design of landslide stabilization
- Issued on:2020-03-06
- Implemented on:2020-10-01
- File Format:PDF
- Delivery:Via email within 10 business days
$941.00
《GB/T 38509-2020滑坡防治设计规范》由TC93（全国自然资源与国土空间规划标准化技术委员会）归口，主管部门为自然资源部(国土)。
Introduction
Key points of landslide prevention and control project design
Project classification and load standards
Based on the threatened objects and economic losses, the prevention and control projects are divided into four levels:
| Grade | Number of people threatened | Typical facilities |
|---|---|---|
| Special grade | >500 | Nuclear facilities, buildings over 30 floors |
| Grade I | 100-500 | Railway trunk lines, oil and gas pipelines |
| Grade II | <100 | Secondary highways, medium-sized water conservancy projects |
| Grade III | - | Village roads, small power projects |
Note: The earthquake load is taken as 10% of the exceedance probability in 50 years. Special demonstration is required for special projects.
Key technologies of anti-slide piles
- Rectangular anti-slide pilesMinimum side width ≥1.25m, pile spacing 5-10m
- Circular anti-slide pilesDiameter ≥0.6m, reinforcement ratio ≥0.2%
- The length of the embedded section must meet the following requirements: Rock layer ≥1/4 pile length, soil layer ≥1/3 pile length
Innovative design of anchor cable engineering
Case study of the Three Gorges Reservoir area: Using pressure-dispersed anchor cables, the designed anchoring force is 1500kN, the anchoring section length is 8m, and the bonding strength is increased by 40% through secondary splitting grouting
Dynamic design and information-based construction
A monitoring data feedback mechanism is used to adjust design parameters in real time based on geological anomalies revealed during construction, ensuring that the project safety factor is always ≥1.25.
Comparison of Typical Engineering Measures
| Measure Type | Applicable Conditions | Cost Index | Construction Period (Month) |
|---|---|---|---|
| Anti-slide Piles | Medium and Thick Layer Landslide | 1.0 | 3-6 |
| Lattice Anchorage | Shallow Rock Landslide | 0.7 | 2-4 |
| Square Cutting to Reduce Load | Steep Landslide at the Rear Edge | 0.5 | 1-3 |
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 50145-2007 in English
Standard for engineering classification of soil
2007-12-24 -
GB 50778-2012 in English
Code for investigation of geotechnical engineering of open pit coal mine
2012-05-28 -
GB/T 18507-2014 in English
Regulations for gradation and classification on urban land
2014-07-24
